diff --git a/src/mcp/client/auth.py b/src/mcp/client/auth.py
index 775fb0f6c..17d2558f7 100644
--- a/src/mcp/client/auth.py
+++ b/src/mcp/client/auth.py
@@ -131,7 +131,7 @@ def is_token_valid(self) -> bool:
             and self.current_tokens.access_token
             and (not self.token_expiry_time or time.time() <= self.token_expiry_time)
         )
-
+    
     def can_refresh_token(self) -> bool:
         """Check if token can be refreshed."""
         return bool(self.current_tokens and self.current_tokens.refresh_token and self.client_info)
@@ -546,6 +546,6 @@ async def async_auth_flow(self, request: httpx.Request) -> AsyncGenerator[httpx.
                     logger.exception("OAuth flow error")
                     raise
 
-        # Retry with new tokens
-        self._add_auth_header(request)
-        yield request
+                # Retry with new tokens
+                self._add_auth_header(request)
+                yield request